Core regions across the world

A subsidiary of BASF - We create chemistry
22.05.2012

Wintershall goes forward with MariaAppraisal well confirms upper end of discovery estimate / License partners assess options for field development

Stavanger. Wintershall, the largest internationally active German crude oil and natural gas producer, announces the successful drilling of the Maria appraisal well in the Norwegian Sea. Well 6407/1-5 S is located about 20 kilometers east of the Kristin field and about eight kilometers northeast of the Maria discovery Wintershall made in 2010. The purpose of the appraisal well was to delineate the Maria discovery and prove hydrocarbons in the northern extent of the structure. “Our preliminary calculations do not only confirm our original resource estimates, but support the upper end of our discovery volumes”, says Bernd Schrimpf, Managing Director of Wintershall Norge. The original Maria discovery has been estimated to contain between 60 and 120 million barrels of recoverable oil and between 2 and 5 billion standard cubic meters (sm3) of recoverable gas.

Wintershall will now continue to assess together with its partners various development solutions for the discovery. “The extensive data we have acquired with the appraisal well will further support our analysis for an optimum development concept for Maria – either a subsea tieback or a standalone development”, says Maria Project Manager Hugo Dijkgraaf. “Proving oil in the northern extent of the structure has always been the strong goal of our technical team. Our current success once again shows their excellent expertise.”

The well encountered a 39-metre thick oil column in the Garn formation and reservoir quality as expected. The oil-water contact in well 6407/1-5 S is the same as in the discovery well, and pressure data indicate communication between north and south. The discovery is delineated to the north. A successful formation test has been carried out.

The well was drilled by the drilling facility Borgland Dolphin to a total depth of 4,133 meters below the sea surface and terminated in the Tilje formation in the Lower Jurassic. The water depth at the location is 297 meters. Wintershall Norge AS is the operator, with a 50 per cent share. The other licensees are Petoro AS (30 per cent) and Centrica Resources AS (20 per cent).

The North Sea is one of the traditional core regions of Wintershall. With over 40 licenses and more than 20 operatorships, Wintershall is one of the largest license holders in Norway. The company invested around half of its global exploration budget in the Norwegian continental shelf alone in 2011. Wintershall plans to invest up to two billion euros in exploration and field development in Norway and the UK and is aiming for a production level of 50,000 BOE per day by 2015. The fields Knarr, Edvard Grieg and Cladhan should contribute to meeting this target.

Wintershall Holding GmbH, based in Kassel, Germany, is a wholly-owned subsidiary of BASF in Ludwigshafen. The company has been active in the exploration and production of crude oil and natural gas for over 80 years. Wintershall focuses on selected core regions, where the company has built up a high level of regional and technological expertise. These are Europe, North Africa, Page 3 of 3 South America, as well as Russia and the Caspian Sea region. In addition, these operations are complemented by the company’s growing exploration activities in the Arabian Gulf. Today, the company employs more than 2,000 staff worldwide from 40 nations and is now Germany’s largest crude oil and natural gas producer. With the natural gas trading and transport subsidiaries it operates together with Russia’s Gazprom, the BASF subsidiary is also an important gas supplier on the German and European market.

Wintershall. Shaping the Future.

Contact: Verena Sattel